Steam-boiler



(No Model.) I

J. R. VANCE. STEAM BOILER.

No. 595,589 Patented Dec. 14,1897.

A ttorney.

, UNITED STATES PATENT EErcE.

JAMES R. VANCE, OF GENEVA, NEW YORK.

STEAM-BOILER.

SPECIFICATION formingpart of Letters Patent No. 595,589, dated December 14, 1897. Application filed September 4, 1897. Serial No. 650,617. (No model.)

To all whom it may concern.-

Be it known that 1, JAMES R. VANCE, of

Geneva, in the county of Ontario, in the State I of New York, have invented new and useful Improvements in Steam-Boilers, of which the following, taken in connection with the accompanying drawings, is a full, clear, and exact description.

My invention relates to improvements in boilers for steam or hot-water heating; and the object is to increase the efficiency of the boiler and to economize in fuel.

To this end my invention consists in the combination ofa horizontal cylinder or shell, a smaller horizontal shell oblong in cross-section, with flat sides projecting from one end of the first cylinder, fire tubes extending through each shell, a chamber at one end of the large-shell communicating with all the tubes, one end of each of the tubes in the large shell opening into the furnace, a chamher at the end of the small shell communicating with its tubes, and a chimney connected to the latter chamber; and my invention consists in certain other combinations of parts, hereinafter described, and specifically set forth in the claims.

My invention is similar to that shown and described in my prior United States Letters Patent, dated January 26, 1897, No. 575,786.

In the drawings hereto annexed and forming a part of this specification, Figure 1 is a longitudinal sectional view of the boiler and furnace; and Fig. 2 is an end view of the boiler, looking toward the end having the smaller shell, the cap on the end of the latter being removed to show the interior clearly.

Referring specifically to the drawings, A is the large horizontal cylinder or shell of the boiler, and B is the smaller shell,which is oblong in cross-section and provided with flat sides, and which allow the flanged ends of return-pipes H H to be riveted to it easily. The smaller shell is united to one end of the large shell, its axis being below the axis of the large shell and its lower side being nearly on a line with the lower side of the large shell.

0 is a partition near one end of the shell A, and C is a partition near one end of the cylinder B, which partitions serve to support the fire tubes or flues and form communicating passages for the products of combustion berectly into the furnace or fire-flue below. The

tubes D D, &c., are divided or separated into two groups by the small shell B, there being no room for tubes below the plane of the lower side of the said shell.

D D are the long central tubes, extending longitudinally through both shells and supported at their ends by the partitions O and C. The tubesD' D are nearly twice the length of the tubes D D, 850.

I indicates the supply-pipe, which may be united to the boiler at any suitable or desirable point.

The grate F for the fire is preferably located below the large cylinder or shell, but may be located below the small shell, if desired.

-It will be obvious also, as indicated by broken lines in Fig. 1, that a side feed or chute J may be provided for the furnace, if desired.

The unfeathered arrows show clearly the path of the product of combustion through the tubes and chambers at the ends of the boiler.

From an examination of the drawings it will be obvious that the fire first strikes the entire outer surfaces of both shells, then passes through the tubes D D, &c., to the chamber formed by the partitions O, and then back through the tubes D D, &c., to the chamber at the end of the small cylinder, where it passes up the chimney Y. By this means the boiler is thoroughly and equally heated at all points, and therefore great efficiency is derived. This efliciency is increased by placing the shells in a horizontal position and placing the small shell with its axis below the axis of the large shell, thus-dividing the short tubes into two groups, which lie upon opposite sides of the long tubes, and separating the products of combustion and then causing them to pass inward through the long tubes. The efficiency is increased also by the inclined surface G of the flue E, which reflects the heat upward and helps to turn the product of combustion toward the open ends of the fire-tubes D D, &c. I

ICO

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a boiler, the combination of a horizontal cylindrical shell, a smaller horizontal shell oblong in cross-section projecting from one end of the large shell, the axis of the small shell being below the axis of the large shell, fire-tubes extending through each shell, a chamber at one end of the large shell communicating with all the tubes, one end of each of the tubes in the larger shell opening into the furnace, and a chamber at the end of the smaller shell communicating with its tubes and the chimney substantially as described and shown.

2. In a boiler, the combination of a horizontal cylindrical shell, a smaller horizontal shell having fiat sides projecting from one end of the large shell, the axis of the small shell being below the axis of the large shell, long fire-tubes extending through both she1ls,short fire-tubes on opposite sides of the long tubes extending through the large shell, a chamber at one end of the large shell communicating with all the tubes, one end of each of the tubes in the larger shell opening into the furnace, and a chamber at the end of the smaller shell communicating with its tubes and the chimney, substantially as described and shown.

3. In a boiler, the combination of a horizontal cylindrical shell, a smaller horizontal shell having tlat sides projecting from one end of the large shell, return-pipes having their flanges riveted to the said flat sides, long firet'ubes extending through both shells, short fire-tubes extending through the large shell divided by the long tubes into two groups, the supply-pipe, a chamber at one end of the large shell communicating with all the tubes, one end of each of the tubes in the larger shell opening into the furnace, and a chamber at the end of the smaller shell communicating with its tubes and the chimney, substantially as described and shown.

4. In a boiler, the combination of a horizontal cylindrical shell, a smaller horizontal shell, oblong in cross-section with fiat sides and curved on top and bottom riveted to one end of the larger cylinder, return-pipes leading from the said flat sides, one or more supply-pipes, long fire-tubes extending through both shells, short fire-tubes on opposite sides of the long tuhesextendin g through the large shell, a chamber at one end of the large shell communicating with all the tubes, one end of each of the tubes in the larger shell opening into the furnace, and a chamber at the end of the smaller shell communicating with its tubes and the chimney, substantially as described and shown.

In testimony whereof I have hereunto signed my name.

JAMES R. VANCE. lVitnesses:

GEORGE W. ALLEN, C. A. MACKEY. 

